It varies by country as to what documents you can get. In most places "Advanced Directives" stating what sort of life support and palliative care you want are available to all adults and often free at clinic or hospital. They aren't suspicious and can be filed in your medical record.. DNR orders are trickier as they are usually only given to people who are terminal or quite old AND will be ignored if there is any doubt...and there is often doubt or the documents aren't present. There are also doctors who morally think a DNR doesn't apply in suicide and will act accordingly so its a total gamble even if you CAN get one. Tattoos, while a nice urban legend, are useless other than to notify responders you have a DNR and they should look for it...similar to alert bracelets. But if it's not right there they aren't going to spend time searching while you die and the tattoo itself has zero legal weight. People wonder about and ask this so much it should be part of a sticky/resources along with the realities of organ donation, going missing, and making it look like an accident. None of this stuff works but I think every one of us wonders about them at some point.
compassionindying.org.uk
